Absorption of short laser pulses in underdense plasma by considering ohmic heating and ponderomotive force effects

2015 ◽  
Vol 57 (8) ◽  
pp. 085001 ◽  
Author(s):  
M Ettehadi-Abari ◽  
M Sedaghat ◽  
B Shokri ◽  
M Ghorbanalilu
Keyword(s):  
Ponderomotive Force ◽  
Ohmic Heating ◽  
Laser Pulses ◽  
Short Laser Pulses ◽  
Underdense Plasma

scholarly journals Production of ion beams in high-power laser–plasma interactions and their applications

2004 ◽  
Vol 22 (1) ◽  
pp. 19-24 ◽  
Author(s):  
F. PEGORARO ◽  
S. ATZENI ◽  
M. BORGHESI ◽  
S. BULANOV ◽  
T. ESIRKEPOV ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Medical Physics ◽  
Ion Beam ◽  
Laser Pulses ◽  
Ion Beams ◽  
Laser Plasma Interactions ◽  
Physical Mechanisms ◽  
Short Laser Pulses ◽  
Laser Pulse Intensity ◽  
Target Design

Energetic ion beams are produced during the interaction of ultrahigh-intensity, short laser pulses with plasmas. These laser-produced ion beams have important applications ranging from the fast ignition of thermonuclear targets to proton imaging, deep proton lithography, medical physics, and injectors for conventional accelerators. Although the basic physical mechanisms of ion beam generation in the plasma produced by the laser pulse interaction with the target are common to all these applications, each application requires a specific optimization of the ion beam properties, that is, an appropriate choice of the target design and of the laser pulse intensity, shape, and duration.

Alternative Laser Driven Fusion Reactions for Nuclear Energy Without Radioactivity

2010 ◽  
Author(s):  
Mahmoud Ghoranneviss ◽  
Babak Malekynia ◽  
Nader Azizi ◽  
Henrich Hora ◽  
George H. Miley
Keyword(s):  
Nuclear Energy ◽  
Ponderomotive Force ◽  
Fusion Energy ◽  
Contrast Ratio ◽  
Laser Pulses ◽  
State Density ◽  
Helium Isotope ◽  
Fusion Reactions ◽  
Solid Density ◽  
Radioactive Radiation

Following the first result of generating nuclear fusion energy without dangerous radioactive radiation by laser ignition of the proton-11Boron reaction (HB11), we applied this method to evaluate other fusion reactions with no primary neutron production as the proton-7Lithium reaction (HLi7) and of the burning of solid density helium isotope 3He (He3-He3). The new method is a combination of now available laser pulses of 10 petawatt (PW) power and duration in the range of picoseconds (ps) or less. The new mechanism follows the initial theory of Chu and of Bobin for side-on ignition of solid state density fusion fuel developed in about 1972 where some later known physics phenomena had to be added. The essential innovation is the use of the discovery of a predicted anomaly when the mentioned laser pulses are sufficiently clean, i.e. free from prepulses by at least a contrast ratio 108 where acceleration by the nonlinear (ponderomotive) force is dominating.

Mechanisms of nanoparticle formation by short laser pulses

2007 ◽  
Author(s):  
Tatiana E. Itina ◽  
Mikhail E. Povarnitsyn ◽  
Karine Gouriet ◽  
Sylvie Noël ◽  
Jörg Hermann
Keyword(s):  
Laser Pulses ◽  
Nanoparticle Formation ◽  
Short Laser Pulses

Multistate non-Hermitian Floquet dynamics in short laser pulses

2000 ◽  
Vol 61 (3) ◽  
Author(s):  
H. C. Day ◽  
Bernard Piraux ◽  
R. M. Potvliege
Keyword(s):  
Laser Pulses ◽  
Short Laser Pulses
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